Thread tension



Jan. 6, 1931.

F. w. MERRICK THREAD TENSION Filed Feb. 24, 1930 im||mm= EIIIIIIIHH 2%.

llilhm mix ATTORNEY Patented Jan. 6, 1931 V I 1,788,199

UNITED STATES PATENT OFFICE FRANK W; max, 01' DORCHESTEB, MASSACHUSETTS, ASSIGNOB T WONDER WEAVB, INC., 0]! BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS mum mansion Application ma February 24, mo. Serial No. 430,115.

This invention relates to let-ofi means for In the drawing, thread and similar wound material and it has Fig. 1 is a plan of a thread supply device for its object to provide a let-off means which or carrier here embodying my invention and shall be simple in construction, of such c0m-- of its holding means; a

pact form as to adapt it for use in shuttles 2 is a section on line 2-2, Fig. 1; or shuttle-like devices, and which, while cag- 3 is on n line 35, Fig- 1; and pable of being set or adjusted at will to change Flgs; 4 a 5 re front and side elevations the tension on the thread, will preserve the of What shown In gtension equable at all times. The invention h y 1 9f the thread-supply device or 1 relates particularly to that class of let-off earner tapers 1h Pl at both ends after the 00 means in which the thread or equivalent is h j of an Ordinary Shuttle and at one supplied by a revoluble wound package there-' end 1S beveled h the p h at the other of which rotates under draft on the thread at P It 15 held h 'y y p and subject to the braking resistance of a P of l 2 Whose members m each P 15 lever' against which the thread bears at a are mtergeared y W y, as at so t 65 guiding point removed from its fulcrum in they move into and out griPPing relation to the carrier together. ,A spring 4 actin a way when tautened to shift the lever from on a member 5 g g the two lower j the package. According to thisinvention the t d k l f V lever is so constructed, and also so arranged en S eqp a two P 0 laws open with respect to the package, that a straight out 0 f but means (not 70 line connecting the fulcrum and thread-guid- S OW-n) ac mg on pus S 6 so as t9 close the aws alternately keeps the carrier al.- mg Pomts of the Lever crofsses the wourld ways held by one or the other pair, Thus, mass of the package intervening between said as in my Said application filling may be so that with the thread tautened it assed throu h sheds formed in the war B r extends {130m b mass of the Package FigL 1) ovei the carrier from the right of l to the said guiding point of the lever n a the fabric and warp Sheet and back rearwardly duecwjd tangent; therefore a under the carrier in loops which will be rearwardly extehdmg bend blght caught by the thread C extending from the Stitutihg an important factor in the main carrier and which thus binds in these loops so eh of f tenslon 9 h h' asfilling components of the fabric A, thread 1 he formed T thread at Seld guldmg C thus becoming an edge warp. This thread Polht dreft helhg exerted on the thread C should in such a case as this be under a 1n the dlreetleh most favorablerte movement tension which is variable at will but equable of the lever by the thread, 01 forwardly- III in all possible conditions under which the 85 the example herein shown the lever extends weaving may b i d th t insure around the forward side of the package, an uniformity of the edge of the'fabric in which. that is material in that thereby the lever may it lies. be made very light but strong and that it Thread C extends from a mass C thereof 40 leads to compactness of construction andconwound on a bobbin or core 7 they forming on tributes to house the windings of the package. a wound package which is revoluble on a stud In the preferred construction the braking 8 upstanding from an open-top recess 9 point of the lever is relatively near its fulformed in the body 1 and which at the back crum, so that the lever is ver sensitive to conforms to the (circular) shape of the bobthe displacing influence of the t read. In the bin but at the front is open, as shown at 1a; example the package comprises, with the communicating with this recess is a forwound mass of thread,'a core therefor, and wardly open undercut 10 having a fulcrum it is against this rather than said mass that pin 11 fixed in its topand bottom walls (Fig. the lever has braking contact; but this is not 2). The body 1' stands with the open-top 50 indispensable. of its recess up, and when the package is endo the latter when tautenedtends 4f said wound mass, the

eye 1'4 affording ;means have been wound mass.

placed in the reces'sdt operatively reposes therein due to gravity alone; it re readily removable by inverting the carrier if On pin nphery of the package S0 that a flat 13 affording the braking. point of the lever and an the thread-guiding point in nse ver extending around the pethe package from which the material extends I from the mass to said guide and having its thereof are in a'straight line which crusses"'fuIcrum an-d the guide arranged in a straight p the wound "mass lever iswsubject p p 7 sprin -15 which is attached to the fulcrum the lever and bears against andiss'nbject toadjustment by a set-screw 1 6 tapped into the carrier body; Inth'is examplethe flat 13 of the lever contacts with the peripheral flanges of the bobbin'of the package, as shown inFig. 3. i V

' am aware, as indicated, that left-off proposed in-which a brake lever is normally held against the wound mass and has a guide for the thread by which to displace the lever from the package; but so. far as I am aware this is the first instance in which the. thread guiding and fulcrum points of, thelev'er have been so relatedto the wound mass'ofthe package that a straight line conenacting them crosses the package, with the result that the threatlassumes a rearward tangent to said mass'and the mentioned advantage consequent thereon follows.

Having thus fully described my inventionwhat I claim is:

1. In combination, supporting means, a' wound package journaled thereon, and a brake lever yieldingly held in braking contact with a peripheral surface of the package and having a guide for the wound material extendin from the wound mass of the package, .the ulcrum and guide of the lever being arranged in a straight line crossing said .2. In combination, supporting means, a Wound package journaled thereon and including a core and-a wound mass thereon, and a brake lever yieldingly held in braking contact with a peripheral surface of the core and ha'vinga guide for the. wound material extending from" said wound mass, the fulcrum and guide of the lever being arranged in a straig 3. In combination,

wound package journaled thereon, ,.,a'nd a brake lever yieldingly held in braking contact with aperipheral surface of the package and having a guide for the wound material extending from the wound mass of the package, being arranged in a straight line crossing point of braking contact of the lever with the package being near said fulcrum.

wound package jour supporting means, a

,of Jthe package when th'eY to the pressure of a-Upl atewith the package. t line crossing said wound mass.

supporting .means, a

line crossin said wound mass.

'5. Incom ination, v recess therein, a wound package journaled on sixidZbbdy, said recess having an opening opposit-e the'periphery pf the package at one side of a diameter thereof, a brake lever in said opening arranged at said side of-said diameter and fulcrumed in said body and having a guide'for the wound material extending from the package and one of its end portions reaching between the periph'eryiof the package and a surface of the opening, and a spring interposed between said end portion and surface and holding the lever in raking contact with the package.

6. In combination, a carrier bod havin a recess therein, a wound'package ]0l1111hl6 fjonsaidbo'dy; said recess havingan opening opposite the periphery of the package at one side of a. diameter thereof, a brake lever in said opening arranged at said side 'of said diameter and having one of its end reaching and fulcrumed in s'aidbody between the periphery of the packageand a; surface .of theopening and also havinga guide for the wound material extending from the package, and' a spring interposed between said end portion and surface and holding the lever in braking contact with the package.

7 In combination, a recess therein, a wound on said body, said opposite the periphery of the package-atone side of a diameter thereof, and a brake lever arranged in said opening at said side of said diameter and fulcrumed in said body near said diameter at one side'of the package and having a guide for the woundmaterial extending from the package arrangednear said diameter at the opposite side of-the package and normally held in braking jcontact package journaled In testimony whereof I aflix-my s'ignature.

FRANK W. MERRICK.

the fulcrum and guideof the lever a: carrlerbody having a .95 portions a carrier. body having ecess having an opening Ian 

